A display panel and a mixed material detection method thereof

Abstract

The present invention discloses a display panel and a mixed material detection method thereof, wherein the display panel comprises N first test pads, N groups of first main line units and N first branch lines; a group of first main line units comprises at least one first main line; a first branch line is electrically connected to a first test pad and all first main lines in a group of first main line units respectively; N is an integer greater than or equal to 3; along the thickness direction of the display panel, each first main line does not overlap each other, and each first branch line does not overlap each other; N first test pads are arranged side by side along the first direction, and at least part of the first main line is arranged side by side along the first direction; along the first direction, the arrangement order of the target received signals corresponding to the first main lines in each first main line unit is a first order, and the arrangement order of the target received signals corresponding to each first test pad is a second order, and the first order is different from the second order. The technical solution can solve the mixed material problem of display panels with the same appearance but slight differences in display characteristics.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a mixed material detection method thereof. Background Art

[0002] In display products, such as liquid crystal displays (LCD), customers often have production requirements for several products with the same dimensions but slightly different display characteristics. In this way, in the mass production process, different products with the same appearance are easily mixed together, resulting in a large amount of manpower and material resources for product rework, and affecting the normal use of customers. Therefore, how to avoid the mixing of different products with the same appearance before product shipment has become an urgent problem to be solved. Summary of the invention

[0003] The present invention provides a display panel and a mixed material detection method thereof, so as to solve the mixed material problem of display panels with the same appearance but different display characteristics.

[0004] In one aspect, the present invention provides a display panel, comprising: N first test pads, N groups of first main line units, and N first branch lines;

[0005] A group of first main line units includes at least one first main line; a first branch line is electrically connected to a first test pad and all first main lines in the group of first main line units; N is an integer greater than or equal to 3;

[0006] Along the thickness direction of the display panel, the first main lines do not overlap with each other, and the first branch lines do not overlap with each other;

[0007] N first test pads are arranged side by side along a first direction, and at least part of the first main line is arranged side by side along the first direction; along the first direction, the arrangement order of the target received signals corresponding to the first main lines in each first main line unit is a first order, and the arrangement order of the target received signals corresponding to each first test pad is a second order, and the first order is different from the second order.

[0008] On the other hand, based on the same inventive concept, the present invention also provides a mixed material detection method for a display panel, comprising:

[0009] Perform VT test on the panel to be inspected through the target test device;

[0010] Get the test picture of the panel to be tested;

[0011] If the test screen is the same as the target screen corresponding to the VT test, the panel to be tested is determined to be the target panel, otherwise the panel to be tested is determined to be a mixed panel;

[0012] The display panel includes N first test pads, N groups of first main line units and N first branch lines; a group of first main line units includes at least one first main line; a first branch line is electrically connected to a first test pad and all first main lines in a group of first main line units; N is an integer greater than or equal to 3;

[0013] Along the thickness direction of the display panel, the first main lines do not overlap with each other, and the first branch lines do not overlap with each other;

[0014] N first test pads are arranged side by side along a first direction, and at least a portion of the first main lines are arranged side by side along the first direction; along the first direction, the target receiving signals corresponding to the first main lines in each first main line unit are arranged in a first order, and the target receiving signals corresponding to each first test pad are arranged in a second order;

[0015] One of the target panel and the mixed panel satisfies that the first order is the same as the second order, and the other satisfies that the first order is different from the second order.

[0016] The display panel provided by the embodiment of the present invention is arranged in parallel along the first direction by arranging N first test pads, at least part of the first main lines are arranged in parallel along the first direction, each first main line does not overlap with each other in the thickness direction of the display panel, and along the first direction, the arrangement order (first order) of the target received signals corresponding to the first main lines in each first main line unit is different from the arrangement order (second order) of the target received signals corresponding to each first test pad. In this way, for a variety of products that are prone to mixing, the correspondence between at least part of the test pads (i.e., the first test pads) of one type of product and the first main line / first main line unit can be adjusted by adjusting the wiring. In this way, as long as the display panel is not subjected to VT testing using the test device corresponding to this type of product, obvious display abnormalities (such as failure to display, display color inconsistent with target color, etc.) will occur, thereby avoiding mixing of products with the same appearance but slight differences in display characteristics, detecting mixing before the product leaves the factory, and avoiding adverse consequences caused by mixing.

[0017] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Another structural schematic diagram of the F3 area of ​​the display panel shown;

[0021] Figure 3 yes Figure 1 Another structural schematic diagram of the F3 area of ​​the display panel shown;

[0022] Figure 4 yes Figure 1 Another structural schematic diagram of the F3 area of ​​the display panel shown;

[0023] Figure 5 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0024] Figure 6 yes Figure 5 Another structural schematic diagram of the F4 area of ​​the display panel shown;

[0025] Figure 7 yes Figure 5 Another structural schematic diagram of the F4 area of ​​the display panel shown;

[0026] Figure 8 yes Figure 5 Another structural schematic diagram of the F4 area of ​​the display panel shown;

[0027] Fig. 9 yes Figure 5 Another structural schematic diagram of the F4 area of ​​the display panel shown;

[0028] Fig.10 It is a flow chart of a mixed material detection method for a display panel provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] First of all, it should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left" and "again" are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, the shapes and sizes of the components in the accompanying drawings do not reflect the true proportions, and the purpose is only to illustrate the content of the present invention.

[0031] For example, Figure 1 is a schematic diagram of the structure of a display panel provided by an embodiment of the present invention, such as Figure 1 As shown, the display panel 100 provided by the embodiment of the present invention includes N first test pads Q (such as Q1 to Q4, the numbers after the English letters only represent the numbers, the same below), N groups of first main line units V (such as V1 to V4) and N first branch lines Y; a group of first main line units V includes at least one first main line T; a first branch line Y is electrically connected to a first test pad Q and all the first main lines T in a group of first main line units V; N is an integer greater than or equal to 3 ( Figure 1 Taking N=4 as an example for illustration); along the thickness direction of the display panel, the first main lines T do not overlap with each other, and the first branch lines Y do not overlap with each other; N first test pads Q are arranged side by side along the first direction, and at least part of the first main lines T are arranged side by side along the first direction; along the first direction, the arrangement order of the target received signals corresponding to the first main lines T in each first main line unit V is a first order, and the arrangement order of the target received signals corresponding to each first test pad Q is a second order, and the first order is different from the second order.

[0032] Specifically, Figure 1 As shown, the display panel 100 includes a display area AA and a non-display area NA. In order to clearly show the structural layout of the non-display area, Figure 1 The size of the non-display area NA is relatively large, and in actual products the size of the non-display area NA is much smaller than the size of the display area AA. Figure 1As shown, the non-display area NA includes a binding area F1 and a visual test (Visual Test, VT test for short) area F2, wherein the binding area F1 is provided with a plurality of binding pads 11, and the VT test area F2 is provided with a plurality of test pads 12. The main functions of the binding area F1 and the VT test area F2 are briefly described below.

[0033] Specifically, Figure 1 As shown, the display panel 100 includes a gate driving circuit ASG, and the gate driving circuit ASG is respectively connected to the bonding pad 11 of the bonding area F1 and a plurality of scanning lines S (such as Figure 1 In addition, the bonding pad 11 is also electrically connected to the data line D (such as the signal line between S1 and S6 in FIG. Figure 1 After the driver chip is electrically connected to the binding pad 11 of the binding area F1, the driver chip can provide an electrical signal to the gate driver circuit ASG, so that the gate driver circuit ASG sequentially provides a scan enable signal to each scan line S, so that the thin film transistor electrically connected to the scan line S transmitting the scan enable signal in the display area AA is turned on. At the same time, the driver chip can transmit the data voltage to the thin film transistor in the display area AA in the turned-on state through the data line D, and write the data voltage into the corresponding sub-pixel. In this way, each sub-pixel can be lit up row by row through the row-by-row scanning of the scan line S to complete the display of a frame of the picture, and the video playback can be realized by quickly switching the pictures frame by frame.

[0034] After the display panel is manufactured, it is usually necessary to conduct quality inspection to screen out defective products with abnormal display. Since it is difficult to peel off the driver chip from the display panel and may even damage the driver chip, if the driver chip is electrically connected to the binding pad of the binding area F1 before quality inspection, it will cause waste of some driver chips and increase costs. To avoid this situation, the related technology sets a VT test area F2 in the non-display area NA, and connects the gate drive circuit ASG and the data line D to the corresponding test pad 12. In this way, after the display panel is manufactured, before the driver chip is bound, the corresponding test signal can be loaded to the test pad 12 through the test device to drive the display panel to display the picture, so as to detect whether the display panel can display normally and avoid increasing costs. The principle of driving the display is basically the same as that of the driver chip driving the display panel to display the picture, which will not be repeated here.

[0035] For example, Figure 1As shown, a part of the test pad 12 can be connected to the main line 13 between the binding pad 11 and the gate drive circuit ASG through a part of the branch line 14, and another part of the test pad 12 can be connected to the main line 13 (i.e., the data line D) between the binding pad 11 and the sub-pixel in the display area AA through another part of the branch line 14. In this way, the test device can transmit the corresponding electrical signal to the gate drive circuit ASG and the data line D through the branch line 14, drive the display panel to display the picture, and complete the VT test.

[0036] In this embodiment, the first test pad Q may refer to at least part of the test pads 12, that is, part of all the test pads 12 may be used as the first test pad Q, or all the test pads 12 may be used as the first test pad Q, which is not limited in this embodiment of the present invention. Figure 1 In the embodiment, the test pads 12 electrically connected to the gate drive circuit ASG are used as the first test pads Q, such as the first test pads Q1, the first test pads Q2, the first test pads Q3 and the first test pads Q4. This setting is not limited. In other embodiments, some of the test pads 12 electrically connected to the gate drive circuit ASG can be used as the first test pads Q, the test pads 12 electrically connected to the data lines D can be used as the first test pads Q, or all the test pads 12 can be used as the first test pads Q, which is not limited in the embodiment of the present invention.

[0037] Accordingly, the first branch line Y and the first main line T can be determined according to the first test pad Q. Specifically, the first branch line Y refers to a branch line electrically connected to the first test pad Q among all the branch lines 14 electrically connected to the test pad 12; the first main line T refers to a main line electrically connected to the first test pad Q through the first branch line Y among all the main lines 13 electrically connected to the binding pad 11, and all the first main lines T electrically connected to the same first branch line Y can constitute a group of first main line units V, and a group of first main line units V can include at least one first main line T.

[0038] Further, such as Figure 1 As shown, in this embodiment, each first main line T does not overlap with each other, and each first branch line Y does not overlap with each other. In this way, each first main line T can be set in the same layer, and each first branch line Y can be set in the same layer, which reduces the setting of cross-line in different layers and reduces the difficulty of wiring. At the same time, since each first main line T does not overlap with each other, the arrangement order of each first main line T arranged side by side at different positions is the same (all equivalent to the arrangement order of the parts of the first main line T arranged side by side along the first direction in the first direction), so that the arrangement order of the target receiving signals corresponding to each first main line T is the same. Based on this, this embodiment makes the following definition: along the first direction, the arrangement order of the target receiving signals corresponding to the first main line T in each first main line unit V is the first order.

[0039] Specifically, since all the first main lines T in the same group of first main line units V are electrically connected to the same first test pad Q, the target reception signals corresponding to all the first main lines T in the same group of first main line units V are the same. Therefore, along the first direction, the arrangement order of the target reception signals corresponding to the first main lines T in each first main line unit V can be understood as the arrangement order (in the first direction) of the target reception signals corresponding to the first first main lines T belonging to different first main line units V among the multiple first main lines T arranged along the first direction.

[0040] For example, Figure 1 As shown, when a group of first main line units V includes a first main line T, each first main line T arranged along the first direction is the first first main line of each first main line unit V. Figure 1 In the figure, X1 represents the target signal received by the first main line T in the first main line unit V1, X2 represents the target signal received by the first main line T in the first main line unit V2, X3 represents the target signal received by the first main line T in the first main line unit V3, and X4 represents the target signal received by the first main line T in the first main line unit V4. According to the arrangement order of the first main lines T in the first direction, it can be determined that the arrangement order of the target received signals corresponding to the first main lines T in the first main line units V along the first direction is X1, X2, X3, and X4 (first order).

[0041] certainly, Figure 1 Only one group of first main line units V including one first main line T is used as an example for illustration. In other embodiments, there may be a first main line unit V including multiple first main lines T, which is not limited in the embodiment of the present invention. For example, it is assumed that there are 6 first main lines T, namely T1, T2, T3, T4, T5 and T6, and at least part of the six first main lines are arranged side by side along the first direction, and the arrangement order along the first direction is T1, T2, T3, T4, T5, T6, wherein T1 and T4 belong to the first group of first main line units, and the corresponding target receiving signal is X1', T3 and T5 belong to the second group of first main line units, and the corresponding target receiving signal is X2', T2 belongs to the third group of first main line units, and the corresponding target receiving signal is X3', and T6 belongs to the fourth group of first main line units, and the corresponding target receiving signal is X4'. Based on the above explanation, in this example, among the multiple first main lines T1~T6 arranged along the first direction, the first first main lines belonging to different first main line units are T1, T2, T3 and T6 respectively, and the corresponding target received signals are X1', X3', X2' and X4' respectively. Therefore, along the first direction, the arrangement order (first order) of the target received signals corresponding to the first main line T in each first main line unit V is X1', X3', X2', X4'.

[0042] Further, in this embodiment, along the first direction, the target receiving signals corresponding to the first test pads Q are arranged in a second order, which is different from the first order. It can be understood that the target receiving signal corresponding to any first test pad Q must be the same as the target receiving signal corresponding to the first main line T electrically connected to it. Figure 1 For example, the first test pad Q1 is electrically connected to the first main line T in the first main line unit V2, so the target receiving signal corresponding to the first test pad Q1 is X2; the first test pad Q2 is electrically connected to the first main line T in the first main line unit V1, so the target receiving signal corresponding to the first test pad Q2 is X1; the first test pad Q3 is electrically connected to the first main line T in the first main line unit V3, so the target receiving signal corresponding to the first test pad Q3 is X3; the first test pad Q4 is electrically connected to the first main line T in the first main line unit V4, so the target receiving signal corresponding to the first test pad Q4 is X4. Therefore, along the first direction, the arrangement order (second order) of the target receiving signals corresponding to the first test pads Q1, Q2, Q3 and Q4 is X2, X1, X3, X4, which is different from the first order (X1, X2, X3, X4). With this arrangement, different products can be screened out in the VT test stage to prevent mixing, which is explained in detail below.

[0043] Specifically, during the VT testing phase, usually only the pads (such as the binding pads 11 and the test pads 12) are exposed on the display panel. Therefore, when different products with the same appearance but slight differences in display characteristics (such as luminous brightness) are mixed together, since the internal wiring methods of these products in the prior art are usually completely consistent, when the test device is used for VT testing, it is difficult for the human eye to identify the slight display differences, and thus it is difficult to filter out the mixed panels from the target panels to be shipped. Based on this, for a variety of products that are prone to mixing, the present application adjusts the wiring method to achieve a difference between the arrangement order (second order) of the target receiving signals corresponding to each first test pad Q arranged side by side along the first direction and the arrangement order (first order) of the target receiving signals corresponding to the first main line T in each first main line unit V, thereby adjusting the correspondence between at least part of the test pads (i.e., the first test pad) of one type of product and the first main line / first main line unit. In this way, as long as the display panel is not subjected to VT testing using the test device corresponding to this type of product, obvious display abnormalities (such as inability to display, display color inconsistent with target color, etc.) will occur, thereby avoiding mixing of products with the same appearance but slight differences in display characteristics, detecting mixing before the products leave the factory, and avoiding the adverse consequences of mixing.

[0044] For example, assume that there are two types of products with the same appearance but slight differences in display characteristics. The first order and the second order of the first type of products are the same, and the second type of products are designed using this solution so that the first order and the second order are different. In this way, if the test device corresponding to the first type of products is used to perform VT testing on a batch of display panels, once the second type of products are mixed into the batch of products, the second type of products will have obvious display abnormalities due to the mismatch of the test device, thereby screening out the mixed second type of products from the first type of products to prevent mixing.

[0045] In summary, the display panel provided by the embodiment of the present invention is arranged side by side along the first direction by arranging N first test pads, at least part of the first main lines are arranged side by side along the first direction, each first main line does not overlap with each other in the thickness direction of the display panel, and along the first direction, the arrangement order (first order) of the target received signals corresponding to the first main lines in each first main line unit is different from the arrangement order (second order) of the target received signals corresponding to each first test pad. In this way, for a variety of products that are prone to mixing, the correspondence between at least part of the test pads (i.e., the first test pads) of one type of product and the first main line / first main line unit can be adjusted by adjusting the wiring. In this way, as long as the display panel is not subjected to VT testing using the test device corresponding to this type of product, obvious display abnormalities (such as failure to display, display color inconsistent with target color, etc.) will occur, thereby avoiding mixing of products with the same appearance but slight differences in display characteristics, detecting mixing before the product leaves the factory, and avoiding adverse consequences caused by mixing.

[0046] As described above, the first test pad Q may be at least a portion of the test pads electrically connected to the gate drive circuit ASG among all the test pads 12, or at least a portion of the test pads electrically connected to the data line D among all the test pads 12, or all the test pads. Below, the technical solutions of the embodiments of the present invention are further explained by taking the test pads corresponding to different functions of the first test pad as examples.

[0047] As a feasible implementation method, continue to refer to Figure 1 Optionally, the N first test pads Q include M first drive test pads 121; the N groups of first main line units V include M groups of first drive main line units, one group of first drive main line units includes a first drive main line 131, and the first drive main line 131 is electrically connected to the gate drive circuit ASG; the N first branch lines Y include M first drive branch lines 141, and the two ends of a first drive branch line 141 are respectively electrically connected to a first drive test pad 121 and a first drive main line 131; M is an integer, and 2≤M≤N; along the first direction, the arrangement order of the target received signals corresponding to each first drive main line 131 is different from the arrangement order of the target received signals corresponding to each first drive test pad 121.

[0048] Among them, the first drive test pad 121 refers to the test pad electrically connected to the gate drive circuit ASG among all the test pads 12, and the M first drive test pads 121 can be part (at least two) or all of all the test pads 12 electrically connected to the gate drive circuit ASG, which is not limited to the embodiment of the present invention. Figure 1 The example of M=N=4 and M first drive test pads 121 (N first test pads) corresponding to all the test pads electrically connected to the gate drive circuit ASG is used for illustration only, and is not limiting. In other embodiments, the M first drive test pads 121 may be part of the test pads electrically connected to the gate drive circuit ASG; in addition, in other embodiments, the first test pad Q may also include other test pads that are not electrically connected to the gate drive circuit ASG, and the embodiment of the present invention is not limited to this.

[0049] Based on the above explanation, the embodiment of the present invention sets the arrangement order of the target receiving signals corresponding to each first driving main line 131 along the first direction to be different from the arrangement order of the target receiving signals corresponding to each first driving test pad 121, so that as long as the display panel is not subjected to VT test using the test device corresponding to the display panel, there will be at least two first driving test pads 121 whose target receiving signals do not match the electrical signals provided by the test device, thereby causing the gate driving circuit ASG to fail to work properly and the display panel to fail to display, so that the staff can easily detect that the display panel is mixed. Similarly, if a batch of products is subjected to VT test using the test device corresponding to the display panel, other display panels will also fail to display normally and will be judged as mixed.

[0050] For example, Figure 1 As shown, along the first direction, the arrangement order (first order) of the target receiving signals of the four first driving main lines 131 is X1, X2, X3, and X4, and the arrangement order (second order) of the target receiving signals of the four first driving test pads 121 is X2, X1, X3, and X4. In this way, if the test device provides the electrical signals of X1, X2, X3, and X4 to this part of the test pads, the gate drive circuit will not work properly, and thus the display will not be able to be displayed. It can be determined that the display panel is mixed.

[0051] It should be noted that Figure 1The scheme shown only takes the first two (X1 and X2) in the first sequence and the first two (X2 and X1) in the second sequence as an example to make the first sequence different from the second sequence. In this way, only the wiring of the two first drive branches 141 needs to be adjusted to achieve the above-mentioned anti-mixing requirements, and the change to the display panel is relatively small. Of course, this setting method is not limited. In other embodiments, the target received signals at more positions in the first sequence and the second sequence may be inconsistent, so that the first sequence is different from the second sequence. Exemplarily, assuming that the first design order is X1, X2, X3, X4, and the second design order is X4, X1, X2, X3, at this time, the design can be implemented by electrically connecting the first test pad Q1 to the first driving main line 131 in the first main line unit V4, electrically connecting the first test pad Q2 to the first driving main line 131 in the first main line unit V1, electrically connecting the first test pad Q3 to the first driving main line 131 in the first main line unit V2, and electrically connecting the first test pad Q4 to the first driving main line 131 in the first main line unit V3, so as to achieve the purpose of preventing material mixing in the VT test stage.

[0052] It should also be noted that Figure 1 Only the number of the first driving test pads 121 is four as an example for illustration, and this setting is not limited, and the required electrical signals can be determined according to the specific circuit structure of the gate driving circuit ASG, and then the number of the first driving test pads 121 can be determined. Exemplarily, in a specific embodiment, the electrical signals X1, X2, X3 and X4 required by the gate driving circuit ASG can be a high level signal VGH, a low level signal VGL, a first clock signal CK1 and a second clock signal CK2, respectively.

[0053] Figure 2 yes Figure 1 Another structural schematic diagram of the F3 area of ​​the display panel is shown, Figure 2 As shown, in one embodiment, optionally, the first driving main line 131 and the first driving branch line 141 are arranged in the same layer, and the first driving main line 131 and the first driving branch line 141 that are not electrically connected do not overlap each other. Figure 2 The first driving main line 131 is represented by a thicker solid line, and the first driving branch line 141 is represented by a thinner solid line. In this embodiment, the first driving main line 131 and the first driving branch line 141 are arranged on the same layer, and the first driving main line 131 and the first driving branch line 141 that are not electrically connected are ensured not to overlap each other, which not only simplifies the process, but also further reduces the cross-line of different layers, thereby avoiding the generation of parasitic capacitance due to overlap between different signal lines, reducing signal interference, and ensuring the accuracy of the transmitted signal.

[0054] For further information, see Figure 2Optionally, the first driving main line 131 includes a first main line division 1311, a second main line division 1312 and a third main line division 1313, the second main line division 1312 is electrically connected between the first main line division 1311 and the third main line division 1313, the extension direction of the second main line division 1312 intersects with the extension direction of the first main line division 1311 and the extension direction of the third main line division 1313, and the second main line division 1312 passes through the area where the first driving test pad 121 is located; the display panel includes at least one test group 15, a test group 15 It includes two adjacent first drive test pads 121 (such as first drive test pads 121-1 and 121-2); along the arrangement direction of the first drive test pads 121, two second main line divisions 1312 (such as second main line divisions 1312-1 and 1312-2) corresponding to the two first drive test pads 121 in the test group 15 are respectively located on opposite sides of the test group 15, and the arrangement order of the target receiving signals corresponding to the two adjacent first drive test pads 121 is opposite to the arrangement order of the target receiving signals corresponding to the two second main line divisions 1312.

[0055] In this embodiment, the second main line section 1312 of the first driving main line 131 passes through the area where the first driving test pad 121 is located (ie, the VT test area), which can further improve the space utilization of the VT test area and save more space for the arrangement of other components or wiring.

[0056] Further, in the present embodiment, for the M first drive test pads 121, one group of two adjacent first drive test pads 121 may be selected to form a test group, or multiple groups of two adjacent first drive test pads 121 may be selected to form multiple test groups, which is not limited in the present embodiment. For two adjacent first drive test pads 121 in any test group 15, it is necessary to satisfy that along the arrangement direction of the first drive test pads 121 (such as the first direction), the arrangement order of the target receiving signals corresponding to the two adjacent first drive test pads 121 in the test group 15 is opposite to the arrangement order of the target receiving signals corresponding to the two second main line divisions 1312, so as to realize that the arrangement order of the target receiving signals corresponding to the first drive test pads 121 is different from the arrangement order of the target receiving signals corresponding to the first drive main line 131, and to realize the anti-mixing of materials in the VT test stage.

[0057] Furthermore, in order to achieve the above-mentioned design requirements for preventing mixing of materials and ensure that the first drive main line 131 and the first drive branch line 141 are arranged in the same layer, and the first drive main line 131 and the first drive branch line 141 that are not electrically connected do not overlap each other, in this embodiment, the two second main line divisions 1312 corresponding to the two first drive test pads 121 in a test group 15 are respectively arranged on opposite sides of the test group 15. In this way, winding space can be provided for the first drive branch lines 141 corresponding to the two first drive test pads 121 in the test group 15, so as to achieve the different arrangement orders of the above-mentioned target receiving signals, and at the same time avoid the overlap of the first drive branch line 141 that is not electrically connected with the first drive main line 131.

[0058] For example, Figure 2 Taking the first drive test pad 121-1 and the first drive test pad 121-2 as an example to constitute a test group 15, along the arrangement direction of the first drive test pad 121 (such as the first direction), the second main line division 1312-1 corresponding to the first drive test pad 121-1 and the second main line division 1312-2 corresponding to the first drive test pad 121-2 are respectively located on opposite sides of the test group 15, and the target receiving signal corresponding to the first drive test pad 121-1 is X2, the target receiving signal corresponding to the second drive test pad 121-2 is X1, and the target receiving signal corresponding to the second main line division 1312-1 is X1, and the second main line division 1312-2 is X2. The target receiving signal corresponding to the main line division 1312-2 is X2, and the arrangement order of the target receiving signals corresponding to the two adjacent first drive test pads (121-1 and 121-2) (i.e., X2, X1) is opposite to the arrangement order of the target receiving signals corresponding to the two second main line divisions (1312-1 and 1312-2) (i.e., X1, X2). Therefore, on the basis of the first drive main line 131 and the first drive branch line 141 being arranged on the same layer, the arrangement order of the target receiving signal corresponding to the first drive test pad 121 can be different from the arrangement order of the target receiving signal corresponding to the first drive main line 131, thereby preventing mixing of materials in the VT test stage.

[0059] It should be noted that Figure 2Only the first drive test pad 121-1 and the first drive test pad 121-2 constitute a test group 15 as an example for illustration, this setting method is not limiting, in other embodiments, when the display panel has a test group, other two adjacent first drive test pads 121 can also be selected to constitute the test group, for example, the first drive test pads 121-2 and 121-3 can be selected to constitute the test group, or the first drive test pads 121-3 and 121-4 can be selected to constitute the test group. In addition, in other embodiments, the display panel can also have a larger number of test groups, for example, the first drive test pads 121-1 and 121-2 constitute a test group, and the first drive test pads 121-3 and 121-4 constitute a test group, and the embodiment of the present invention is not limited to this. For any test group 15, it is sufficient to ensure that the two second main line divisions 1312 corresponding to the two first drive test pads 121 in the test group 15 are respectively located on the opposite sides of the test group 15, and the arrangement order of the target receiving signals corresponding to the two adjacent first drive test pads 121 is opposite to the arrangement order of the target receiving signals corresponding to the two second main line divisions 1312.

[0060] It should also be noted that, for two adjacent first drive test pads 121 that do not constitute a test group, since the first drive branch lines 141 corresponding to the two first drive test pads 121 do not need to be wound, the two second main line divisions 1312 corresponding to the two first drive test pads 121 can be located on the opposite sides of the two first drive test pads 121, or can be spaced apart from the two first drive test pads 121, and the embodiments of the present invention are not limited to this.

[0061] For example, Figure 2 As shown, the arrangement order of the target receiving signals corresponding to the first drive test pads 121-3 and 121-4 is consistent with the arrangement order of the target receiving signals corresponding to the second main line divisions 1312-3 and 1312-4 corresponding to the two, both of which are X3 and X4. Therefore, the first drive branch line 141 corresponding to the first drive test pads 121-3 and 121-4 has no winding requirement. At this time, the second main line division 1312-3 corresponding to the first drive test pad 121-3 and the second main line division 1312-4 corresponding to the first drive test pad 121-4 can also be located on the opposite sides of the first drive test pads 121-3 and 121-4. Figure 3 yes Figure 1 Another structural schematic diagram of the F3 area of ​​the display panel is shown, Figure 3 As shown, in other embodiments, along the arrangement direction of the first drive test pad 121 (such as the first direction), the first drive test pad 121-3, the second main line division 1312-3, the first drive test pad 121-4 and the second main line division 1312-4 can also be spaced apart (the test pads and the signal lines are spaced apart from each other).

[0062] Figure 4 yes Figure 1 Another structural schematic diagram of the F3 area of ​​the display panel is shown, Figure 4 As shown, optionally, the first main line branch 1311 is located at a side of the first driving test pad 121 close to the gate driving circuit ASG; the two first driving test pads 121 in the test group 15 are respectively a first pad (such as 121-2) and a second pad (such as 121-1); the first driving branch line (141-2) corresponding to the first pad (121-2) is located from the side of the first pad (121-2) away from the first main line branch 1311, and half surrounds the second pad (121-1). The first main line branch (1311-1) corresponding to the first pad (121-2) is extended to the first main line branch (1311-1) and is electrically connected to the first main line branch (1311-1); the first driving branch line (141-1) corresponding to the second pad (121-1) extends from the side of the second pad (121-1) close to the first main line branch 1311 to the first main line branch (1311-2) corresponding to the second pad (121-1) and is electrically connected to the first main line branch (1311-2). In this way, the arrangement order of the target receiving signals corresponding to the two adjacent first driving test pads 121 in the test group 15 can be achieved by winding the wires to be opposite to the arrangement order of the target receiving signals corresponding to the two corresponding second main line branches 1312, thereby achieving the arrangement order of the target receiving signals corresponding to the first driving test pad 121 to be different from the arrangement order of the target receiving signals corresponding to the first driving main line 131, and preventing mixing of materials in the VT test stage.

[0063] It should be noted that Figure 4 Only the first drive test pad 121-1 and the first drive test pad 121-2 constitute a test group 15, and the first drive test pad 121-2 is used as the first welding pad, and the first drive test pad 121-1 is used as the second welding pad, and the first drive branch line 141-2 corresponding to the first drive test pad 121-2 is wound as an example for illustration. In other embodiments, refer to Figure 2 Alternatively, the first driving test pad 121 - 1 may be used as a first welding pad, and the first driving test pad 121 - 2 may be used as a second welding pad, and the first driving branch line 141 - 1 corresponding to the first driving test pad 121 - 1 may be wound.

[0064] In summary, the above embodiment takes the first test pad Q including the first drive test pad 121 electrically connected to the gate drive circuit ASG as an example to explain in detail the technical solution of the embodiment of the present invention. Below, taking the first test pad Q including the test pad electrically connected to the data line as an example, the technical solution of the embodiment of the present invention is further explained.

[0065] As another possible implementation, Figure 5is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention, such as Figure 5 As shown, optionally, N first test pads Q include K first color test pads 122 (the number after "122-" only indicates the number, the same below); N groups of first main line units V include K groups of first data main line units H, one group of first data main line units H includes multiple first data main lines 132, and each first data main line 132 of the same group is connected to the sub-pixel P of the same luminous color; N first branch lines Y include K first data branch lines 142, and one first data branch line 142 is electrically connected to a first color test pad 122 and each first data main line 132 of the same group respectively; K is an integer, and 2≤K≤N; along the first direction, the first data main lines 132 in the K groups of first data main line units H are arranged alternately and periodically in sequence; the arrangement order of the target receiving signals corresponding to the K first data main lines 132 within an arrangement period is different from the arrangement order of the target receiving signals corresponding to the K first color test pads 122.

[0066] Among them, the first color test pad 122 refers to the test pad electrically connected to the data line D among all the test pads 12, and the K first color test pads 122 can be part (at least two) or all of all the test pads electrically connected to the data line D, which is not limited in the embodiment of the present invention. Figure 5 The example of K=N=3 and K first color test pads 122 (N first test pads Q) corresponding to all test pads electrically connected to the data line D is used for illustration only, and is not limiting. In other embodiments, the K first color test pads 122 may be a part of the test pads electrically connected to the data line D; in addition, in other embodiments, the first test pads Q may also include other test pads that are not electrically connected to the data line D, and the embodiment of the present invention is not limited to this.

[0067] In the present embodiment, a group of first data main line units H includes multiple first data main lines 132, and each first data main line 132 of the same group is connected to a sub-pixel P of the same luminous color, and a first data branch line 142 is electrically connected to a first color test pad 122 and each first data main line 132 of the same group, respectively. In this way, the testing device can send a data signal to the sub-pixel P of the same luminous color connected to the group of first data main lines 132 through a first color test pad 122 to light up the part of the sub-pixels, reduce the number of test pads set, and reduce the area occupied by the VT test area to the non-display area.

[0068] For example, Figure 5As shown, the first data main line 132-1 and the first data main line 132-4 belong to the first data main line unit H1, and are both connected to the red sub-pixel R, and are electrically connected to the first color test pad 122-2 through the first data branch line 142; the first data main line 132-2 and the first data main line 132-5 belong to the first data main line unit H2, and are both connected to the green sub-pixel G, and are electrically connected to the first color test pad 122-1 through the first data branch line 142; the first data main line 132-3 and the first data main line 132-6 belong to the first data main line unit H3, and are both electrically connected to the blue sub-pixel B, and are electrically connected to the first color test pad 122-3 through the first data branch line 142. In this way, the lighting of the green sub-pixel G can be controlled by the first color test pad 122-1, the lighting of the red sub-pixel R can be controlled by the first color test pad 122-2, and the lighting of the blue sub-pixel B can be controlled by the first color test pad 122-3.

[0069] Furthermore, in this embodiment, along the first direction, the first data main lines 132 in the K groups of first data main line units H are arranged alternately and periodically. In other words, for the plurality of first data main lines 132 arranged along the first direction, each K first data main lines 132 is set as an arrangement period, and the K first data main lines 132 in the arrangement period correspond to the K first data main line units H one by one. For example, Figure 5 As shown, the first data main lines 132-1, 132-2 and 132-3 form an arrangement period and correspond to the first data main line units H1, H2 and H3 respectively, and the first data main lines 132-4, 132-5 and 132-6 form an arrangement period and correspond to the first data main line units H1, H2 and H3 respectively, so that the first data main lines 132 in the three groups of first data main line units H1, H2 and H3 are arranged alternately and periodically. In this embodiment, by arranging the first data main lines 132 in the K groups of first data main line units H alternately and periodically, sub-pixels of different luminous colors can be arranged alternately, and a pixel is composed of the minimum repeating unit of sub-pixels in one arrangement period, so as to realize color display.

[0070] Furthermore, in this embodiment, along the first direction, the arrangement order of the target received signals corresponding to the K first data main lines 132 (such as 132-1, 132-2 and 132-3) in one arrangement period ( Figure 5 The order of arrangement of the solutions shown is X R , X G , X B ) and the target received signals corresponding to the K first color test pads 122 (such as 122-1, 122-2 and 122-3) are arranged in an order ( Figure 5 The order of arrangement of the solutions shown is X G , XR , X B ) are different. Among them, X R , X G , X B Respectively represent the data voltages for lighting up the red sub-pixel, the green sub-pixel, and the blue sub-pixel. With such a configuration, as long as the electrical signal applied by the test device to the first color test pad 122 does not match the target received signal required by the first color test pad, it will cause abnormal color display, thereby preventing mixing of materials in the VT test phase. For example, if the electrical signals provided by the test device to the three first color test pads 122-1, 122-2, and 122-3 are respectively X R , X G and X B , the purpose is to light up the red sub-pixel, the green sub-pixel and the blue sub-pixel in sequence during the VT test phase to display a red picture, a green picture and a blue picture. However, when the test device is applied to the display panel provided by the embodiment of the present invention, when the red sub-pixel is lit (i.e., an electrical signal is applied to the first color test pad 122-1), the actual displayed picture is a green picture, so it can be easily determined that the display panel is a mixed panel and needs to be screened out.

[0071] It should be noted that Figure 5 It is only taken that all first data main lines 132 electrically connected to the red sub-pixel R are electrically connected to the same first color test pad 122, all first data main lines 132 electrically connected to the green sub-pixel G are electrically connected to the same first color test pad 122, and all first data main lines 132 electrically connected to the blue sub-pixel B are electrically connected to the same first color test pad 122, that is, the display panel includes sub-pixels of W (W=3) luminous colors, and the number K of the first color test pads 122 is equal to W. In other embodiments, it can also be set that the sub-pixels connected to all first data main lines 132 connected to a first color test pad 122 are only part of the sub-pixels of the luminous color, as long as the first data main lines 132 in the same group are connected to sub-pixels of the same luminous color.

[0072] For example, Figure 6 yes Figure 5 Another structural schematic diagram of the F4 area of ​​the display panel is shown in FIG. Figure 6 As shown, optionally, the display panel includes sub-pixels of W luminous colors, K=2W.

[0073] For example, Figure 6 Take W=3, and the display panel includes a red sub-pixel R emitting red light, a green sub-pixel G emitting green light, and a blue sub-pixel B emitting blue light as an example. Figure 6As shown, in this embodiment, the VT test area includes 6 first color test pads 122, corresponding to 6 first data main line units H, namely H1, H2, H3, H4, H5 and H6, and the first data main lines 132 in the 6 first data main line units H are alternately and periodically arranged in sequence, as shown in FIG. Figure 6 The data lines D1-D6 constitute one arrangement period, and these 6 data lines belong to 6 first data main line units H respectively. The data lines D7-D12 constitute the next arrangement period, and these 6 data lines belong to 6 first data main line units H respectively.

[0074] Further, such as Figure 6 As shown, when K=2W, optionally, the K first color test pads 122 include two red test pads (PR1 and PR2), two green test pads (PG1 and PG2) and two blue test pads (PB1 and PB2), and the polarities of the data signals received by the two red test pads (PR1 and PR2) are opposite, the polarities of the data signals received by the two green test pads (PG1 and PG2) are opposite, and the polarities of the data signals received by the two blue test pads (PG1 and PG2) are opposite. With such a configuration, during the VT test, an electrical signal can be provided to the corresponding two first color test pads through the test device to light up a sub-pixel of a luminous color.

[0075] When K=2W, the anti-mixing of materials in the VT test phase can also be achieved by setting the arrangement order of the target receiving signals corresponding to the K first data main lines 132 in one arrangement period along the first direction to be different from the arrangement order of the target receiving signals corresponding to the K first color test pads 122. For example, Figure 6 As shown, assuming that along the first direction, the arrangement order of the target received signals corresponding to the six first data main lines 132 (such as D1 to D6) in one arrangement period is X R+ , X G+ , X B+ , X R- , X G- , X B- (“+” and “-” represent opposite signal polarities), Figure 6 The scheme shown in the figure adjusts the wiring method so that the arrangement order X of the target receiving signals corresponding to the six first color test pads 122 is G+ , X R+ , X G- , X B+ , X R- , X B-, the two are in different orders. In this way, as long as the electrical signal applied by the test device to the first color test pad 122 does not match the target received signal required by the first color test pad, it will cause abnormal color display and prevent mixing of materials. Of course, the arrangement order of the target received signal corresponding to the first color test pad 122 can also be other orders, which is not limited in the embodiment of the present invention. Figure 6 For example, if the electrical signals provided by the test device to the six first color test pads are X R+ , X G+ , X B+ , X R- , X G- , X B- The purpose is to light up the red sub-pixel through the first and fourth color test pads from left to right, light up the green sub-pixel through the second and fifth color test pads, and light up the blue sub-pixel through the third and sixth color test pads. However, the staff used this test device to Figure 6 When testing the display panel shown, since the pad layout of all products is the same, the staff will still pair the first and fourth color test pads, the second and fifth color test pads, and the third and sixth color test pads, and apply data voltages of opposite polarity to the two color test pads of each pair. At this time, the display panel will display a cyan picture (a mixture of green and blue), a red picture, and a cyan picture in sequence, which is obviously different from the expected display picture, so that the mixing can be realized.

[0076] Figure 7 yes Figure 5 Another structural schematic diagram of the F4 area of ​​the display panel is shown in FIG. Figure 7As shown, optionally, the N first test pads Q include C first switch test pads 123 and K first color test pads 122, C and K are both integers, and C+K≤N, 2≤C≤K; the N groups of first main line units V include K groups of first data main line units H, one group of first data main line units H includes multiple first data main lines 132, and each first data main line 132 of the same group is connected to a sub-pixel of the same luminous color; the N first branch lines Y include C first switch branch lines 143 and K first data branch lines 142; the display panel also includes C groups of first switch units U, each group of first switch units The element U includes multiple thin film transistors L, and each first data main line 132 corresponding to the sub-pixel of the same luminous color is electrically connected to the first electrode of the thin film transistor L of the same group, and the second electrode of the thin film transistor L corresponding to each first data main line 132 of the same group is electrically connected to the same first color test pad 122 through the same first data branch line 142, and the gate of the thin film transistor L of the same group is electrically connected to the same first switch test pad 123 through the same first switch branch line 143; along the first direction, the first data main lines 132 in the K group of first data main line units H are arranged alternately and periodically in sequence.

[0077] Reference Figure 7 , this embodiment and Figure 5 The difference between the structures shown is that a thin film transistor L is added. Accordingly, in the VT test area, in addition to the test pad electrically connected to the gate drive circuit ASG and the test pad electrically connected to the data line D, there is also a test pad electrically connected to the thin film transistor L (i.e., the first switch test pad 123). In this way, in the VT test phase, the first switch test pad 123 and the first color test pad 122 need to cooperate with each other. Specifically, the first switch test pad 123 and the first color test pad 122 corresponding to a sub-pixel of a light-emitting color need to be respectively applied with an electrical signal for selecting the thin film transistor and a data voltage signal, so that the data voltage can be written to the corresponding sub-pixel. Exemplary, Figure 7The display panel includes three groups of first switch units U, namely, first switch units U1, U2 and U3, wherein the gate electrodes of the thin film transistors L1 and L4 of the first switch unit U1 are connected to the same first switch test pad 123-2, and the first electrodes of the two are respectively electrically connected to the first data main lines 132-1 and 132-4 corresponding to the red sub-pixel R, and the second electrodes of the thin film transistors L1 and L4 corresponding to the first data main lines 132-1 and 132-4 belonging to the same group are also electrically connected to the same first color test pad 122-1 through the same first data branch line 142, so that the lighting of the red sub-pixel R can be controlled by the first switch test pad 123-2 and the first color test pad 122-1; similarly, the gate electrodes of the thin film transistors L2 and L5 of the first switch unit U2 are connected to the same first switch test pad 123-1, and the first electrodes of the two are respectively electrically connected to the first data main lines 132-2 and 132-5 corresponding to the green sub-pixel G. The second electrodes of the thin film transistors L2 and L5 corresponding to the first data main lines 132-2 and 132-5 belonging to the same group are also electrically connected to the same first color test pad 122-2 through the same first data branch line 142. In this way, the lighting of the green sub-pixel G can be controlled through the first switch test pad 123-1 and the first color test pad 122-2; the gate electrodes of the thin film transistors L3 and L6 of the first switch unit U3 are connected to the same first switch test pad 123-3, and the first electrodes of the two are respectively electrically connected to the first data main lines 132-3 and 132-6 corresponding to the blue sub-pixel B. The second electrodes of the thin film transistors L3 and L6 corresponding to the first data main lines 132-3 and 132-6 belonging to the same group are also electrically connected to the same first color test pad 122-3 through the same first data branch line 142. In this way, the lighting of the blue sub-pixel B is controlled through the first switch test pad 123-2 and the first color test pad 122-1.

[0078] Furthermore, in order to achieve anti-mixing in the VT test stage, e.g. Figure 7 As shown, optionally, along the first direction, the arrangement order of the luminous colors of the sub-pixels connected to each first switch test pad 123 is ( Figure 7 The arrangement order of the scheme shown is green, red, blue) and the arrangement order of the minimum arrangement period of the light emitting colors of the sub-pixels connected to each first data main line 132 within an arrangement period ( Figure 7 The order of arrangement of the scheme shown is red, green, blue). Or, Figure 8 yes Figure 5 Another structural schematic diagram of the F4 area of ​​the display panel is shown in FIG. Figure 8 As shown, optionally, along the first direction, the arrangement order of the target received signals corresponding to the K first data main lines 132 in one arrangement period ( Figure 8 The order of arrangement of the solutions shown is X R , XG , X B ) and the arrangement order of the target received signals corresponding to the K first color test pads 122 ( Figure 8 The order of arrangement of the solutions shown is X G , X R , X B ) are different. Or, Fig. 9 yes Figure 5 Another structural schematic diagram of the F4 area of ​​the display panel is shown in FIG. Fig. 9 As shown, optionally, along the first direction, the arrangement order of the luminous colors of the sub-pixels connected to each first switch test pad 123 is ( Fig. 9 The arrangement order of the scheme shown is green, red, blue) and the arrangement order of the minimum arrangement period of the light emitting colors of the sub-pixels connected to each first data main line 132 within an arrangement period ( Fig. 9 The arrangement order of the scheme shown is red, green, and blue), and the arrangement order of the target received signals corresponding to the K first data main lines 132 in one arrangement cycle ( Fig. 9 The order of arrangement of the solutions shown is X R , X G , X B ) and the arrangement order of the target received signals corresponding to the K first color test pads 122 ( Fig. 9 The order of arrangement of the solutions shown is X G , X R , X B )different.

[0079] For example, refer to Figure 7 , from left to right, when the test device is used to apply an electrical signal, the first switch test pad (such as the first switch test pad 123-1) is matched with the first color test pad (such as the first color test pad 122-1) to light up the red sub-pixel, the second switch test pad (such as the first switch test pad 123-2) is matched with the second color test pad (such as the first color test pad 122-2) to light up the green sub-pixel, and the third switch test pad (such as the first switch test pad 123-3) is matched with the first color test pad (such as the first color test pad 122-3) to light up the blue sub-pixel. When the test device is applied to Figure 7 In the display panel shown in FIG. 1 , although the data signal of the first color test pad 122-1 is provided to the second electrode of the thin film transistor connected to the red sub-pixel R, the selection signal of the first switch test pad 123-1 is provided to the gate electrode of the thin film transistor connected to the green sub-pixel G. Therefore, the display panel cannot display because the thin film transistor corresponding to the red sub-pixel R cannot be selected, so that mixing can be realized. When the test device is applied to Figure 8In the display panel shown in the figure, although the selection signal of the first switch test pad 123-1 is provided to the gate electrode of the thin film transistor connected to the red sub-pixel R, the data signal of the first color test pad 122-1 is provided to the second electrode of the thin film transistor connected to the green sub-pixel G. The first switch test pad 123-1 and the first color test pad 122-1 correspond to sub-pixels of different colors, respectively, and the display panel cannot display either, so it can be realized that the mixture is present. When the test device is applied to Fig. 9 In the display panel shown, the selection signal of the first switch test pad 123-1 is provided to the gate of the thin film transistor connected to the green sub-pixel G, and the data signal of the first color test pad 122-1 is provided to the second electrode of the thin film transistor connected to the green sub-pixel G. Although the display panel can be lit, the actual displayed color is green, not the expected red, so mixing can also be realized.

[0080] like Figure 7 As shown, optionally, the display panel includes sub-pixels of W luminous colors, C=W. Figure 7 Taking the display panel including sub-pixels of three luminous colors, namely red sub-pixel R, green sub-pixel G and blue sub-pixel B as an example, the thin film transistors L corresponding to the sub-pixels of the same luminous color are electrically connected to the same first switch test pad 123. With such a configuration, the lighting of all sub-pixels of the same luminous color can be controlled by a first switch test pad 123, thereby reducing the number of test pads and reducing the area occupied by the non-display area.

[0081] It should be noted that Figure 7-Figure 9 Taking the number K=W of the first color test pads 122 as an example, referring to the above embodiment, when the VT test area is provided with the first switch test pad 123, the number of the first color test pads 122 can also be twice the number of sub-pixel types, that is, K=2W, and the embodiment of the present invention is not limited to this.

[0082] Finally, it should be noted that the arrangement order (first order) of the target received signal of the first test pad provided in any of the above embodiments and the arrangement order (second order) of the target received signal corresponding to the first main line in the first main line unit are only for illustration and not for limitation, as long as the first order is different from the second order.

[0083] Based on the same inventive concept, an embodiment of the present invention further provides a mixed material detection method for a display panel. Fig.10 is a flow chart of a mixed material detection method for a display panel provided by an embodiment of the present invention, such as Fig.10 As shown, the mixed material detection method includes the following steps:

[0084] S101 , performing a VT test on the panel to be inspected by a target testing device.

[0085] S102: Acquire a test image of the panel to be inspected.

[0086] S103: If the test picture is the same as the target picture corresponding to the VT test, the panel to be tested is determined to be the target panel; otherwise, the panel to be tested is determined to be a mixed panel.

[0087] The display panel includes N first test pads, N groups of first main line units and N first branch lines; a group of first main line units includes at least one first main line; a first branch line is electrically connected to a first test pad and all first main lines in a group of first main line units respectively; N is an integer greater than or equal to 3; along the thickness direction of the display panel, the first main lines do not overlap with each other, and the first branch lines do not overlap with each other; the N first test pads are arranged side by side along the first direction, and at least part of the first main lines are arranged side by side along the first direction; along the first direction, the arrangement order of the target received signals corresponding to the first main lines in each first main line unit is the first order, and the arrangement order of the target received signals corresponding to each first test pad is the second order; one of the target panel and the mixed panel satisfies that the first order is the same as the second order, and the other satisfies that the first order is different from the second order.

[0088] Among them, the target panel can be understood as the product that needs to be shipped or undergo the next process among a batch of products undergoing VT testing, and the mixed panel is a product that has the same appearance as the target panel but very small differences in display characteristics. The mixed panel needs to be screened out from the target panel.

[0089] Among them, the target test device corresponds to the target panel. In other words, the electrical signal provided by the target test device to each test pad matches the target receiving signal corresponding to each test pad. Based on the above explanation, this embodiment sets one of the target panel and the mixed panel to satisfy the first order and the second order are the same, and the other satisfies the first order and the second order are different, so that the electrical signal provided by the target test device and the target receiving signal corresponding to at least part of the test pads of the mixed panel do not match, and then the mixed panel has obvious display abnormalities, so that the staff can determine that the display panel is a mixed panel, screen it out, and achieve anti-mixing in the VT test stage. Please refer to the explanation of the above embodiment for the specific principle, and no more details will be given here.

[0090] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: N first test pads, N groups of first main line units and N first branch lines; A group of the first main line units includes at least one first main line; One of the first branch lines is electrically connected to one of the first test pads and all the first main lines in a group of the first main line units; N is an integer greater than or equal to 3; Along the thickness direction of the display panel, the first main lines do not overlap with each other, and the first branch lines do not overlap with each other; N first test pads are arranged side by side along a first direction, and at least a portion of the first main lines are arranged side by side along the first direction; along the first direction, the target received signals corresponding to the first main lines in each of the first main line units are arranged in a first order, and the target received signals corresponding to each of the first test pads are arranged in a second order, and the first order is different from the second order; The display panel includes a target panel and a hybrid panel; the second order of the target panel is different from the second order of the hybrid panel.

2. The display panel according to claim 1, characterized in that: The N first test pads include M first drive test pads; the N groups of the first main line units include M groups of first drive main line units, one group of the first drive main line units includes a first drive main line, and the first drive main line is electrically connected to the gate drive circuit; the N first branch lines include M first drive branch lines, and two ends of one of the first drive branch lines are electrically connected to one of the first drive test pads and one of the first drive main lines respectively; M is an integer, and 2≤M≤N; Along the first direction, an arrangement order of target reception signals corresponding to each of the first driving main lines is different from an arrangement order of target reception signals corresponding to each of the first driving test pads.

3. The display panel according to claim 2, characterized in that: The first driving main line and the first driving branch line are arranged in the same layer, and the first driving main line and the first driving branch line which are not electrically connected do not overlap each other.

4. The display panel according to claim 3, characterized in that: The first driving main line includes a first main line division, a second main line division and a third main line division, the second main line division is electrically connected between the first main line division and the third main line division, the extension direction of the second main line division intersects with the extension direction of the first main line division and the extension direction of the third main line division, and the second main line division passes through the area where the first driving test pad is located; The display panel includes at least one test group, one test group includes two adjacent first drive test pads; along the arrangement direction of the first drive test pads, two second main line divisions corresponding to the two first drive test pads in the test group are respectively located on opposite sides of the test group, and the arrangement order of the target receiving signals corresponding to the two adjacent first drive test pads is opposite to the arrangement order of the target receiving signals corresponding to the two second main line divisions.

5. The display panel according to claim 4, characterized in that: The first main line branch is located on a side of the first driving test pad close to the gate driving circuit; The two first drive test pads in the test group are respectively a first welding pad and a second welding pad; the first drive branch line corresponding to the first welding pad extends from a side of the first welding pad away from the first main line division, semi-surrounding the second welding pad to the first main line division corresponding to the first welding pad, and is electrically connected to the first main line division; the first drive branch line corresponding to the second welding pad extends from a side of the second welding pad close to the first main line division to the first main line division corresponding to the second welding pad, and is electrically connected to the first main line division.

6. The display panel according to claim 1, characterized in that: The N first test pads include K first color test pads; the N groups of the first main line units include K groups of first data main line units, one group of the first data main line units includes a plurality of first data main lines, and each of the first data main lines in the same group is connected to sub-pixels of the same luminous color; the N first branch lines include K first data branch lines, and one of the first data branch lines is electrically connected to one of the first color test pads and each of the first data main lines in the same group; K is an integer, and 2≤K≤N; Along the first direction, the first data main lines in K groups of the first data main line units are arranged alternately and periodically; the arrangement order of the target reception signals corresponding to the K first data main lines in one arrangement period is different from the arrangement order of the target reception signals corresponding to the K first color test pads.

7. The display panel according to claim 1, characterized in that: The N first test pads include C first switch test pads and K first color test pads, C and K are both integers, and C+K≤N, 2≤C≤K; The N groups of the first main line units include K groups of first data main line units, one group of the first data main line units includes a plurality of first data main lines, and each of the first data main lines in the same group is connected to a sub-pixel of the same luminous color; The N first branch lines include C first switch branch lines and K first data branch lines; the display panel further includes C groups of first switch units, each group of the first switch units includes a plurality of thin film transistors, the first data main lines corresponding to sub-pixels of the same luminescent color are electrically connected to the first electrodes of the thin film transistors of the same group, the second electrodes of the thin film transistors corresponding to the first data main lines of the same group are electrically connected to the same first color test pad through the same first data branch line, and the gates of the thin film transistors of the same group are electrically connected to the same first switch test pad through the same first switch branch line; Along the first direction, the first data main lines in K groups of the first data main line units are arranged alternately and periodically; Along the first direction, the arrangement order of the luminous colors of the sub-pixels connected to the first switch test pads is different from the arrangement order of the minimum arrangement period of the luminous colors of the sub-pixels connected to the first data main lines within one arrangement period; and / or, Along the first direction, an arrangement order of target reception signals corresponding to the K first data main lines within an arrangement period is different from an arrangement order of target reception signals corresponding to the K first color test pads.

8. The display panel according to claim 7, characterized in that: The display panel includes sub-pixels of W luminous colors, C=W.

9. The display panel according to claim 6 or 7, characterized in that: The display panel includes sub-pixels of W luminous colors, K=W, or K=2W.

10. The display panel according to claim 9, characterized in that: The display panel includes a red sub-pixel emitting red light, a green sub-pixel emitting green light, and a blue sub-pixel emitting blue light; When K=2W, the K first color test pads include two red test pads, two green test pads and two blue test pads, and the polarities of the data signals received by the two red test pads are opposite, the polarities of the data signals received by the two green test pads are opposite, and the polarities of the data signals received by the two blue test pads are opposite.

11. A method for detecting mixed materials in a display panel, characterized in that: include: Perform VT test on the panel to be inspected through the target test device; Acquire a test picture of the panel to be inspected; If the test picture is the same as the target picture corresponding to the VT test, the panel to be tested is determined to be the target panel, otherwise the panel to be tested is determined to be a mixed panel; The display panel includes N first test pads, N groups of first main line units and N first branch lines; a group of the first main line units includes at least one first main line; one first branch line is electrically connected to one first test pad and all the first main lines in a group of the first main line units; N is an integer greater than or equal to 3; Along the thickness direction of the display panel, the first main lines do not overlap with each other, and the first branch lines do not overlap with each other; N first test pads are arranged side by side along a first direction, and at least a portion of the first main lines are arranged side by side along the first direction; along the first direction, the target received signals corresponding to the first main lines in each of the first main line units are arranged in a first order, and the target received signals corresponding to each of the first test pads are arranged in a second order; One of the target panel and the mixed panel satisfies that the first order is the same as the second order, and the other satisfies that the first order is different from the second order.

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